#include <stdio.h>
#include <ctype.h>

int main(void)
{
    int a = 0;

    printf("%d\n",isupper('a'));
    printf("%d\n",islower('t'));
    printf("%d\n",isalpha(98));
    printf("%d\n",isdigit(1000));
    printf("%c\n",toupper('7')); 
    printf("%c\n",toupper('t')); 
    printf("%c\n",tolower('U'));

    for (;a < 127;a++)
    {
	printf("%c",a);        
    }	    
    getchar();	    
    
    return 0;
}	
